<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script setup>
import { onMounted, onBeforeUnmount, ref, watch } from 'vue'
import * as echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme

// 定义props
const props = defineProps({
  className: {
    type: String,
    default: 'chart'
  },
  width: {
    type: String,
    default: '100%'
  },
  height: {
    type: String,
    default: '350px'
  },
  autoResize: {
    type: Boolean,
    default: true
  },
  chartData: {
    type: Object,
    required: true
  }
})

// 定义响应式的chart实例
const chart = ref(null)

// 初始化图表函数
const initChart = () => {
  chart.value = echarts.init(props.$el,'macarons')
  setOptions(props.chartData)
}

// 设置图表配置项函数
const setOptions = ({ expectedData, actualData } = {}) => {
  chart.value.setOption({
    xAxis: {
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      boundaryGap: false,
      axisTick: {
        show: false
      }
    },
    grid: {
      left: 10,
      right: 10,
      bottom: 20,
      top: 30,
      containLabel: true
    },
    tooltip: {
      trigger: 'axis',
      axisPointer: {
        type: 'cross'
      },
      padding: [5, 10]
    },
    yAxis: {
      axisTick: {
        show: false
      }
    },
    legend: {
      data: ['expected', 'actual']
    },
    series: [{
      name: 'expected',
      itemStyle: {
        normal: {
          color: '#FF005A',
          lineStyle: {
            color: '#FF005A',
            width: 2
          }
        }
      },
      smooth: true,
      type: 'line',
      data: expectedData,
      animationDuration: 2800,
      animationEasing: 'cubicInOut'
    },
      {
        name: 'actual',
        smooth: true,
        type: 'line',
        itemStyle: {
          normal: {
            color: '#3888fa',
            lineStyle: {
              color: '#3888fa',
              width: 2
            },
            areaStyle: {
              color: '#f3f8ff'
            }
          }
        },
        data: actualData,
        animationDuration: 2800,
        animationEasing: 'quadraticOut'
      }]
  })
}

// 监听chartData变化
watch(() => props.chartData, (val) => {
  setOptions(val)
}, { deep: true })

// 挂载生命周期钩子
onMounted(() => {
  initChart()
})

// 卸载生命周期钩子
onBeforeUnmount(() => {
  if (!chart.value) {
    return
  }
  chart.value.dispose()
  chart.value = null
})
</script>